Camera exposure-indicator.



W: L. COOK.

CAMERA EXPOSURE INDICATOR.

APPLICATION FILED OCT-27,19i6.

Patented Dec. 25, 1917'.

Vigil UNITED STATES PATENT oral-on.

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i 4 Patented Dem-25.19 17. PP i3 fil tober, 191s. Seria1No.128,044.

To all whom it may concern:

Be it known that 1, WILLIAM LEsTER COOK, a citizen of the United States,and resident of Rochester, in the couity' of Monroe and State of NewYork, have invented certain new and useful Improvements in CameraExposure-Indicators, of which the following is a specification.

The present invention relatesto camera exposure indicators andparticularly-to the type which points out to the user that thesensitized material has not been adjusted object of the invention afteran-exposure, an being to provide a construction which will cooperateWlth the numbers or characters on the backing sheet of a film for thepur-:

pose of indicatingwhether the film has been exposed.

To this sists of certain parts and combinations of parts all of whichwill: be hereinafter described, the novel featuresbeing pointed out inthe appendedclaims.

In the drawings:- Figure 1 is a perspective view of a fOld ing roll filmcamera with provements applied thereto; Fig.2 isan interior View of theindicator; Fig. 3 is an interior perspective view of theindicatorshowingthe indicator member in a position to cover the charaeteron the:

film backing sheet;

Fig. 4 isa section; on and e a Fig.5 is a detail viewshowingtherspringfor returning the indicating member to normalposition.

the line LP-4', Fig.2;

A folding 1-011 film "camera may embodies ageasing member 1,.a hinged;tfront member 2 adapted t'oserve; asa support for the lensboard '3. Thelens board,carriesa lens. (not.shown) and a shutter 14-of any suitableconstruction, operated generally {by a flexible cable 5- surrounded byaaf-sheath 6. The back"? of the camera is usually providedwithanopeni'ng' 8 cliosefd-I'by a piece of transparent colored celluloid,and the sensitized; material -10. is carried-within the casing 1 on twospools, generally one at* the 1 top and the other at the bottom. 7Overlying this sensitized material 10 is a backing sheet 11 which isprovided with a number of characters 12 usually 1 to 12 for a twelvefilm roll, and 1 to 6 for a six film roll. These characters are broughtopposite the opening Specification .of Letters Patent.

and other ends the invention-conthe present im- NEW YORK utilize theindicating opening in theloa'e'k of" a camera for'mdlcatmg whether ornot the sensitized material or film'at expos'ing position has beenexposed. This is accomplished by controlling an indicatingmember in sucha manner that the latter cooperates with the indicate an exposure uponeach' opening to V actuation of the shutter of the camera.

In the illustrated embodiment of the invention, a small casing 13 isattached to the casing and-has rear wall 7 ofthe camera openings 14 and15 in front and rear walls respectively coincident with the" opening 8in theba ck wal Withinthis casing 13, an indicatingmemberwlfi ismounted, said member preferably beinglin the form of aslide movable toopen or close theopen'ings 14 and 15 and consequently "to open and'closethe opening 8. This 'slide'may be operated in any suitable mannerbut,,in this instance, a flexible cable 17 detachably engages thefslide'16 erably by a grooved" within a notch "19 of an angular extension 20 onthe slide.

The flexible operating; wire 17. is preferably mounted for longitudinalmovement within a sheath erablydetachably connected to the'casing 13- and ito this end having an annular groovedfportion-l22 received within aslot 23 portion 22 being spaced from one end, ofthe sheath so thats'aide'nd' may be" received 1 withina pocket 24c-within the casing. Thesheath 21 may contain at one end a helical spring 25 which acts on'therelease wire 17 in such a manner asto hold thein'dicator The 16:normally in non-indicating position. release ;w ire"21 has a 5fingerpieee '26 at its OlltBInGl'ld which is adaptedto be connected Iby. a-cross -piece 27' with ''a" finger piece 28* of the release wire 5of the shutter operator The sh eath fi of-th'e shutter operator andthe-sheath 21 of the indicator operator may P f-1 head 18 which fits 21,the latter being pref l 7' of the camera casing.

9() in an. end wall of the casing 13,, the grooved" When the indicatoris operated, a detent 30, in the form'of a spring arm arranged Withinthe casing 13 may enter into the path of the indicator l6 and hold thelatter in its shifted position until released from the detent 30. Therelease pressure upon the finger piece 31 of the detent, said fingerpiece extending to the exterior of the casing so that it may be readilymanipulated.

he operativev position; of the camera is shown in Fig. 1. WVhen apicture is to be taken pressure is applied simultaneously to the twofinger pieces26 and 28 through the connection 27. This not only operatesthe shutter of the camera, but also shifts the indicator 16 to cover thenumeral 12 of the backing sheet of the film. The shutter finger piece 28returns but the finger piece 26 is held against return by the detent 30.Should the user of the camera look at the opening 8 to determine thenumber of films used and then find the character to be covered by theindicator 16, a notice given that the film has not been since. the lastexposure. Before the film can be shifted, the finger piece 31 must bedepressed to permit the indicator to uncover the character on thebacking sheet, for unless these characters are visible the dis tance thefilm must be shifted cannot be ascertained. Pressure on the finger piece31 Will cause the detent 30 to release the indicator 16 so that thelatter Will expose the numeral 12. Notice will also be given to the userby the finger piece 26, as the latter will not return to its operativeposition until the indicator 16 has moved to expose the number 12. a

From the foregoing it Will be seen that it is impossible to shift thesensitized material accurately until the indicator 16 has been released.The user of the camera will become accustomed to shifting the filmimmediately after the release of the indicator and in this Way doubleexposures Will be prevented. the indicator 16, notice will finger piecedicator.

' \Vhat I claim as my invention and desire to secure by Letters Patentis 1. The combination with a roll film camera provided With an openingthrough which the numbers on the film backing may be observed, of anexposure indicator adapted to be given by the of the release Wire ofthein- Coplee o! this patent may be obtained for may be effected by- .movedto indicating will be shifted.

Should the user fail to notice cooperate with said opening to indicatean exposure;

2. The combination With a roll film camera provided with an openingthrough which the numbers on the film backing. may be observed, and alsoprovided with a shutter, of

an exposure indicator adapted to cooperate With said opening to indicatean exposure and so connected to the shutter as to be position When theshutter is actuated.

3. An exposure indicator. for cameras comprising an indicating memberadapted to cover the exposed number of a film of a camera, a detent forholding said indicating member in its and a flexible member. V

4. The combination With a rollfilm camera provided With an openingthrough Which'the numbers on a film'backing may be observed, and alsoprovided With a shutter, of an'exposure indicator adapted to cooperatewith said opening to indicate an exposure, and a connection betWeen theshutter and the exposure indicator causing the latter to be moved toindicating position When the shutter is actuated, tion being detachablyconnected to the exposure indicator.

- 5. 11 exposure indicator for cameras comprising an indicator memberfor crating with the indica'tingmea'ns, a flexible operator connected tothe flexible shutter operator and detachably connected to the indicatormember, and a manually releasable detent for holding the indicatingmember in the position-to Which it is shifted by the flexible operator.7

6. An exposure indicator for cameras comprising'a casing, a slide guidedin the casing to cover and uncover the exposed number on the film, aflexible release wire detachably connected to the slide and a fiexiblesheath for the release Wire detachably connected to the casing.

An exposure comprising a casing having an opening, an indicating membermounted in said casing operator for the indicating and adapted to closesaid opening, a flexible WILLIAM LESTER cooK.

five cents each, by addressing the Commissioner of latents, wuhlnztomn.c."

position'eovering the number,

said connecindicator for cameras coop-

